I'd been putting this off for as long as I could, but eventually I got around to replacing my front discs. I have the sport model with the 2FN calipers and 334mm discs. The stealer wanted £600+ for the pair and Godspeed wanted £510 to make them up specially. I then came across this site:

So I bit the bullet and bought them from Euro car parts for £71 each plus 20%tax for the original Pagid/ATE cross drilled disc for an SL500 Part No.: 104220558. I took them to a machine shop and had them machine the hub centers (67>68mm) and the wheel bolt holes drilled out to 14.3mm. I then took them to my local repair shop and had them fitted.

Yes my car came standard with the 17" Madras rims and 334mm rotors. The best conversion if you want to upgrade to the 334mm rotors is to go with the Porsche 6 pot calipers which come with adapters for the VW hubs. You would need to fit at least 17" rims but they are worth it as at > 1800kg, the W8 takes some stopping from high speed.

I thought I would just post up my progress for anyone else coming to this thread at a later stage.

As MarkW8, I have decided to go the Merc route after finding no viable after market alternatives.

The part numbers for the Merc brakes are:
A1294212112 for the solid discs
A1294212312 for the drilled discs

The centres will need to be machined to 68mm and I will find out if the wheel nut holes need to be modified and post up. I have ordered the brakes from Merc directly at a cost of £80 plus VAT each and I hope to be able to have them machined by a pal for a crate of beer!

I tried looking but with out luck I replaced mine last year ( the larger sport model rotors) with a set from Pilenga. I thought I bought them from partsgeek.com but I couldn't find them when I looked today. Pilenga are a very good brand as well for those not familiar with them they are the people who make the brakes for Saab Aero's. After a year I've had great results from them as well and I think I only paid about $90 each too. I'd recommend looking for them before going any other route.

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